[TowerTalk] RE: TowerTalk Digest, Vol 23, Issue 52

[Keith Dutson]

I have heard 28 days is more than 90 percent strength, and never reaches 100
percent cured.

Keith NM5G

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Mike Maddox
Sent: Sunday, November 14, 2004 6:46 PM
To: towertalk at contesting.com
Subject: [TowerTalk] RE: TowerTalk Digest, Vol 23, Issue 52




Hello All,

I have a question regarding tower base concrete.

How long should concrete cure after pouring to be safe to install a
crank-up, tilt over tower???
The mix is 3500 psi.

Many Thanks in advance.  73,  Ted  K2QMF


Without additives, 28 days til 50% strength.  Years until anything
approaching 90%.  You should consider at least 7 days before putting mush
stress on it, it's still green for several days.  Cold temps will delay it
even more.  Even if it's stressed before it should be, and doesn't crack,
does not means it hasn't been damaged and will later fail.  How long do you
expect this install to last?


_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.

_______________________________________________
TowerTalk mailing list
TowerTalk at contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk